Malicious PDF — malware analysis report

Static analysis result for SHA-256 95f8f435198f60c1…

MALICIOUS

PDF

69.4 KB Created: 2021-04-10 01:22:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 89c70525bf9a0d3f1be3bed868332b54 SHA-1: bc5f2a8c22ddb24071d3c76aea1692494a3f8ce3 SHA-256: 95f8f435198f60c1ef66e08f309061053d94ae72946b3baaa0729ee358297b74
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample is a PDF document that contains numerous links to external resources, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs suggest the document is designed to redirect users to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://jottigo.ru/strik?utm_term=jazz+piano+book+pdf+free+download PDF link annotation
    • http://zukirudon.mypressonline.com/big_data_analytics_jntu.pdfIn PDF document text
    • https://cdn.sqhk.co/gemadaruvow/c04gcjd/ludovico_einaudi_sheet_music_nuvole_bianche.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/KKpggwO/zovimijebori.pdfIn PDF document text
    • http://pufivuziviv.mypressonline.com/aldehyde_ketone_and_carboxylic_acid_ncert_solution.pdfIn PDF document text
    • http://kitafoged.medianewsonline.com/caderno_de_anotaes_congresso_2020_tenha_coragem.pdfIn PDF document text
    • http://sinomefonok.mywebcommunity.org/37962899105.pdfIn PDF document text
    • http://lilubaxubaxulu.sportsontheweb.net/31778491621.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bb0106b8-f3e0-414b-a873-a0e24df3f2ad.filesusr.com/ugd/b84a33_1f555c62e94f4b8095454ff9955c1ddb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/posaxugidut/gevojojobale.pdfIn PDF document text
    • https://ad9e3d1f-bb22-46ca-892e-b6aa3325a756.filesusr.com/ugd/837d34_8cc70925009c4c8499706893f23c33e0.pdf?index=trueIn PDF document text
    • http://wuriwafu.epizy.com/vacation_planner_itinerary_template.pdfIn PDF document text
    • http://radosal.rf.gd/84185879594.pdfIn PDF document text
    • http://famomijis.onlinewebshop.net/carding_machine.pdfIn PDF document text
    • https://b4095e1f-5e43-4c35-8b28-ff0c3185c247.filesusr.com/ugd/9cc3de_58d539f2d9ff4ee3ab7e4073a0c998c1.pdf?index=trueIn PDF document text
    • http://pamiwumewamem.epizy.com/external_style_sheet_reference_in_html.pdfIn PDF document text
    • http://wutesejib.onlinewebshop.net/livixexanojagebu.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/delicious_emily_s_road_trip_full.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD164 5192 bytes
SHA-256: c0e93411950973d4f1e6be0a6ef9ebe36a56e40c197ca97948111d103beb05fa
font_01_sfnt_off0000e33d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE33D 11072 bytes
SHA-256: cc394a76f0f8f818b7ff446446eb26551ed9ab09c50c623996f187ab900aa1a1

Open this report in the interactive analyzer, or submit your own file for analysis.